滤池反冲洗水直接回用对给水厂水质的影响

Influence of reusing filter backwashing water directly on the water quality of waterworks plants

研究了V型滤池反冲洗水直接回用对给水厂水质的影响。结果表明：回用滤池反冲洗废水有利于对沉后水浊度的去除，回用比例小于10％时，沉后水浊度呈下降趋势。回用反冲洗水同时会降低沉后水CODMn，还可以小幅度降低沉后水的UV254.当滤池反冲洗水回用比例大于10％时，沉后水中细菌总数有明显提高。最后通过数学方法确定了水厂反冲洗水的最佳回用比为3％～10％。

The influence of reusing V-filter backwashing water directly on the water quality of waterworks plants have been studied. The results show that the reused V-filter backwashing wastewater is beneficial to the removal of turbidity of the settled water. When the reuse ratio is less than 10%, the turbidity of the settled water shows a down- ward trend.And at the same time of backwashing water reuse, the CODMn of the settled water may decrease, and a slight decrease of the UV254 of the settled water also appears. It is noticed that the total bacteria in the settled water increases remarkably,when the reuse ratio of filter backwashing water is more than 10%. At the end,by means of mathematical method, it is verified that the best reuse ratio of the backwashing water in the waterworks plant is 3%- 10%.